Piston-head.



CHARLES M. SEITZ, CF HAVELCCK, NEBRASKA.

ltl'o. 802.327.

Specification of Letters Patent.n

Patented Oct. 17, 1905.

Application filed April l, 1905. Serial Non 258,369.

To LLZ/ whom it may cm1/cern:

Be it known that I, CHARLES M. Serra, a citizen oi' the United States, residing at Havelock, in the county of Lancaster' and State of Nebraska, have invented certain new and useful improvements in Piston-Heads, ot' which the following is a specilication.

My invention relates to pistonheads for engines, and particularly of the reciprocating' type, and has for its object the improvement of piston-heads by which the parts subject to wear may be replaced without removing' the head from the piston-rod, which is accomplished by having the head formed of a spider secured to the end of the rod to which is secured wear-plates between which are mounted the bull-ring to receive the packing.

My invention will be fully explained hereinafter and will be found illustrated in the accompanying' drawings, in which- Figure l is an end view oi' a piston-head made in accordance with my invention; Fig. 2, a view in section on the line w .fr of Fig'. l, and Fig. 3 a similar view on the line gz/ y of Fig. 1.

Referring' to the drawings, in which similar reference characters indicate corresponding parts throughout the several views, A represents the piston-rod, having a slightly conicalshaped end B with an annular Aliange C at the inner end of said conical-shaped end.

D represents the foundation ot' my improved piston-head which I shall designate as spider in the future, and which is mounted on the conical-shaped end C and held in position by means of a nut E,screwed onto a screw-thread ed portion F of rod A. The spider D consists, essentially, oi' a hub G, a plate H, and radial lugs I, having enlarged ends J with screw-threaded sockets K therein.

L represents a plate secured on the front of the pistonby means of screw-threaded bolts M, fitting screw-threaded sockets K,

while N represents a plate secured to the rear side of the piston -head by means oi' countcrsunk bolts 0, secured through holes in plate H and said plate N Q, represents the bull-ring', secured between the plates L and N and having' grooves R to receive the. packing' S.

By this construction it is readily apparent that the plates L and N sustain the wear to which the edge ol" the piston-head is usually subjected, and as these may be removed and replaced at will an economical structure is secured and one that can be repaired 'without removal from the. piston-rod. It will be also noted that the bull-ringQ is 'formed with the grooves R for the packing-rings S on its outer edg'es,\vhich admits of the use of. thicker packing-rings than would be usable if the grooves were intermediate the edges of the ring'.

Having' thus described my invention, what I claim is-w ln a piston-head` a spider comprising a hub adapted to be secured to the end of a pistonrod, a web integral with said hub, and a plurality of lugs extending radially from said hub and `formed integral therewith and with said web, said radial lugs being' provided with enlarged ends having' scrcw-threaded sockets therein, a plate secured to the front ot' the spider by bolts secured in said threaded sockets, a plate secured to the back of the spider by bolts secured in the web, and a bull-ring having grooves at the sides of the ring mounted between said plates, substantially as shown and described.

1n testimony whereof I hereto aitix my sig nature in the presence of two witnesses.

CHARLES M. SEITZ.

Witnesses:

JOHN D. YOUNG, JAs. JAPSON. 

